package com.webdrider.servlet.util.parser.snippet;

import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;

import com.common.model.abstracts.AbstractRequest;
import com.common.model.abstracts.AbstractResponse;
import com.common.security.exceptions.HTTPException;
import com.common.security.exceptions.ParserException;
import com.webdrider.model.action.snippet.Article;
import com.webdrider.model.action.snippet.Domain;
import com.webdrider.model.action.snippet.Tag;
import com.webdrider.model.requests.snippet.SearchSnippetArticleRequest;
import com.webdrider.model.response.snippet.SearchSnippetArticleResponse;
import com.webdrider.servlet.abstracts.XMLParserBase;
import com.webdrider.servlet.util.HTTPProtocol;

public class SearchSnippetArticleXMLParser extends XMLParserBase {

	@Override
	public AbstractRequest parseRequest(InputStream stream) throws ParserException, HTTPException {
		SearchSnippetArticleRequest request = new SearchSnippetArticleRequest();
		
		Document document = createDocument(stream);
		
		Node actionNode = getActionNode(document);
		Node contentNode = getContentNode(document);
		
		insertAction(actionNode, request);
		Element element = getContent(contentNode);
		
		Element session = getElement(element, HTTPProtocol.SESSION);
		Element domain = getElement(element, HTTPProtocol.DOMAIN);
		List<Element> tags = getAllElements(element, HTTPProtocol.TAG);
		
		List<Tag> tagValues = new ArrayList<Tag>();
		
		for (int i = 0; i < tags.size(); i++) {
			tagValues.add(new Tag(tags.get(i).getAttribute(HTTPProtocol.ATTRIBUTE_VALUE)));
		}
		
		request.setSessionId(session.getAttribute(HTTPProtocol.ATTRIBUTE_VALUE));
		request.setDomain(new Domain(domain.getAttribute(HTTPProtocol.ATTRIBUTE_VALUE)));
		request.setTags(tagValues);
		
		return request;
	}

	@Override
	public String parseResponse(AbstractResponse abstractResponse) throws ParserException {
		SearchSnippetArticleResponse response = null;
		if (abstractResponse instanceof SearchSnippetArticleResponse) {
			response = (SearchSnippetArticleResponse) abstractResponse;
		} else {
			throw new ParserException(ParserException.RESPONSE_MATCH_ERROR);
		}
		
		StringBuilder builder = new StringBuilder();
		List<Article> articles = response.getArticles();
		
		builder.append(HTTPProtocol.RESPONSE_TAG);
		builder.append(HTTPProtocol.CLOSE_TAG);
		builder.append(HTTPProtocol.END_LINE);
		builder.append(getAction(response.getRequestAction()));
		builder.append(HTTPProtocol.CONTENT_TAG);
		builder.append(HTTPProtocol.END_LINE);
		for (Article article : articles) {
			builder.append(getSnippetArticle(article));
		}
		builder.append(HTTPProtocol.CONTENT_END_TAG);
		builder.append(HTTPProtocol.END_LINE);
		builder.append(HTTPProtocol.RESPONSE_END_TAG);
		
		return builder.toString();
	}

}
